Rossing machine



Oct. 11, 1932,

HA. GANES ET AL ROSS ING MACHINE 2 Shets-Sheet' '1 Filed Feb. 10. 1930M41. m/v M1. 05

INVENTOR ATTORNEY H. A. GANES ET AL 2 Sheets-Sheet 2 ROSSING MACHINEFiled Feb. 10. 1930 Oct. 11, 1932.

INVENTORS ATTORNEY 55 Wang A/ILOE FIIILH Patented Oct. 11, 1932 STATESFFECE ROSSING MACHINE Application filed February 10, 1930'. Serial No.427,122.

This invention relates to improvements in what are commonly known asrossing machines and it has reference in particular to machines of thatkind that are designed for the removal of bark from logs to be used forthe manufacture of veneering, or for the making of paper pulp or otherproducts.

The principal object of the present invention is to provide a logbarking machine that is readily adjustable to accommodate logs ofvarious lengths and of various diameters, which embodies means forsupporting and axially rotating the logs while acted on by the barkremoving devices which travel along the log as it rotates.

It is also an object to provide a. support for the bark removingdevices, which through the medium of agauge fixed thereto so as to bearin rubbing contact with the log, accu- Z0 rately gauges the depth towhich the bark layer is removed and automatically adapts the same tosurface variations of the log.

Another important object of the invention resides in the details ofconstruction of the bark removing devices, which are in the nature of aseries of revoluble hammers which contact with the bark layer in suchmanner as to break it off in chips; the hammers being arranged insuccession on a driven shaft and are graduated in length so as to removethe bark layer in successive layers from the outside inwardly.

Other objects reside in the details of arrangement of the various partsand in their combination and mode of operation as will hereinafter befully described.

In accomplishing these objects we have provided the improved details ofconstruction, the preferred forms of which are illus trated in theaccompanying drawings, where- 1n Figure 1 is an end elevation of a logbarking machine embodied by the present invention.

Figure 2 is a side elevation of a part of the same.

Figure 3 is a detail, in perspective, showing the arrangement and formof the bark removing hammers.

Figure 4 is a plan view of the machine.

Referring more in detail to thedrawings land 2 designate supportingstandards between which a log, as designated at 3, may be rotatablysupported; the standard 1 being fixed and the standard 2 beingadjustable from and toward the other in order to aceommodate logs ofdifferent length. At one end the log is supported from standard 2 by anaxial pivot 4 and at its opposite end by chuck 5. on the inner end ofarevolubly 0 mounted shaft 6 having a sprocket wheel 7 at its outer endover which a chain belt 8 operates to rotate the log. The belt alsooperates about a driven sprocket 9 fixed on a shaft 10 revol'uble in asupporting bearing 11 and 5 connected through a suitable reductiongearing, as at 12, with an electric driving motor 18.

Mounted parallel with the axis of the log is a horizontal track formedby a pair of parallel rails 1l14 fixed to a base beam 15. Mounted on thetrack, for slidable movement therealong is a carriage 16 having anuti17fixed to its under side and through which a shaft 18', extendedlengthwise ofv the base, between the rails, is threaded. The shaft isrotatably fixed at its ends with supporting bearings 19 and 20 and has agear 21 fixed on one end meshing with a gear 22 fixed on shaft 10 sothat the electric motor 13 operates both to rotate the log and also to.revolve the screw shaft to cause the carriage to move along the track.

Mounted on the carriage 16 is a frame base 23 which is slidably joinedto the carriage 16 by a dovetailed connection as is shown at 24 inFigure 2. An adjusting shaft 25 disposed transversely of the track isrevolubly fixed at one end in a lug 26 projecting upwardly from thecarriage 16 and at its opposite end is threaded through a nut 27depending from and fixed to the under side of the frame base 23. At itsouter end the shaft has a'squar'ed shank 28 adapte'd'for the applicationof a wrench thereto whereby it may be rotated to adjust the frame base23 toward or from the log-supporting means.

Supported by the frame base 23' inbearings 3030 at its opposite sides isa shaft 31 disposed parallel with and directly above the screw shaft 18,and pivotally supported on the shaft 31 is a frame 32 comprisingopposite side sections 32a-32a joined rigidly by spacing bars 32?). Abase 33 is formed on the frame at the side opposite the long bar formounting an electric motor 34 and extending from the frame at the sidedirectly opposite the motor are arms 35-35 which at their upper endsrevolubly support a shaft 36 on which a series of bark removing hammers37 are fixed. The shaft 36 has a sprocket wheel 38 at one end alinedwith a similar sprocket 39 on the driving shaft 40 of motor 34 and achain belt 42 operates over the sprockets to revolve the shaft 36 andthe bark removing hammers thereon.

In the arrangement of the frame 32 pivotally on the shaft 31 it isadapted to be tilted from or toward the log so as to bring the barkremoving hammers into position for contact with logs of variousdiameters and also to permit automatic adjustment of the device to thesurface variations of the log as it revolves. The slidable adjustment ofthe base 23 on the carriage permits the whole mechanism carried by thebase, to be moved from and toward the log supporting means to therebyaccommodate it to logs of various size.

Fixed on the base 23 between the side members of the frame 32 andtransversely of the shaft 31 is a radially curved arch 44 and pivotallyattached to this by a pin 45 at the side nearest the log is a rod 46which extends slidably through a lug 47 on the frame. At the outer endof the rod is a nut 48 and coiled about the rod and bearing against theframe lug and against nut 48 is a spring 49 which operates to yieldablyurge the frame toward the log and thereby retains the bark removinghammers in proper relation to the log for the removal of the bark.

To limit the extent to which the bark layer may be removed by therevolving hammers, we have provided a gauge or guide in the nature of alever arm 50 that is pivotally mounted about the shaft 36 with one end50a curved upwardly to engage with the barked surface of the log afterthe fashion of a sled runner. The other end of the lever is adjustablyattached through a pivoted nut 53 to a threaded screw 54 carried in apivoted nut 55 mounted in an arm 35 of the frame. Rotation of the screwby means of a wheel 56 at its lower end adjusts the gauge runner toregulate the depth to which the bark layer is removed. When it isdesired to withdraw the hammers from the log, this is done manually bymanipulation of a hand wheel 60 on a shaft 61 mounted in supportingbearings 62 carried by the frame 32. At its inner end the shaft 61 has abevel gear 63 fixed thereon in mesh with a bevel gear 64 keyed on across shaft 65 mounted in the frame and extended concentrically throughthe radially curved arch 44. On this shaft 65 is a gear 66 meshing withgear teeth 67 on the arch. By this mechanism, rotation of the hand wheel60 causes rotation of the gear 66 and, through connection of the latterwith the arch, the frame will be tilted inwardly or outwardly. Thisgearing is not of such character that it will in any way interfere withthe automatic adjustment of the frame under influence of the spring 49.V

A novel feature of invention resides in the construction of the hammersand their rela tionship. These hammers are in no sense knives or cuttersthat soon become dulled by reason of contact with sand and grit in thebark but are in the nature of double ended hammers. Each hammer consistsof a fiat bar, provided centrally with an opening for 7 receiving theshaft 36 and each has a forwardly directed, blunt nose 37a at its end.The hammers are arranged along the shaft, each advanced relative to theother and the hammers at the end are progressively decreased inlength'so that as the device is ad vanced along the log, the bark isremoved in successive layers. The rapidly revolving hammers, simplyoperate to pound the bark off in small chips.

It is quite apparent that details of construction and arrangement ofparts might be altered without departing from the scope of theinvention, and for this reason, it is not desired'that the claims belimited only to the precise details shown but that they broadly coverthe device commensurate with the scope of the invention.

Having thus described our invention what we claim as new therein anddesire to secure by Letters-Patent, is:

1. In a device for removing. bark from logs, the combination with logsupporting and rotating means of a barking head comprising a revolublydriven shaft parallel with the log supporting means, a series of hammersarranged in close relation radially of and fixed on the shaft, eachsuccessive hammer being angularly advanced with respect to the'one nextadjacent, and said hammers at the opposite ends of the series being Igradually decreased in length.

2. A combination as recited in claim 1, wherein each of the hammers hasa forwardly curved blunt end portion.

Signed at Tacoma, WVashington, this 3rd day of January, 1930.

HAKON ADOLPH GANES. WILLIAM KILDE.

